Anyone know how to contact Ian Johnson?

Hi Hope this is in the right forum! Some years ago we were fortunate enough to play in a number of bands directed by Ian Johnson a band trainer and conductor of considerable talent. Bands he conducted included Hanwell, Jaguar Cars (City of Coventry), Nassington and Matthews Norfolk Brass. After graduating from the Guildhall School of Music and Drama he worked as a music teacher at Whitgift School, Croydon and Wisbech Grammar. The last contact we had with Ian was at Cambridge Contest back in the early 90's. We would really like to get back in touch with Ian, anyone any news of his whereabouts? We believe he may be in the North Yorkshire area.